245 is the width in MM.... 45 is the ratio to the width that gives the tire wall height. 18 is size of wheel.

245mm X 0.45 = your sidewall height. Take this side wall height, multiply by 2 and add to your wheel size to give you the total diameter of your tire. don't forget to convert mm to inches or visa versa.

245/45/18...The 245 is the width of the tire , but it may not be exactly 245MM every manufacturer is different.

The 45 is your tire side wall height in mm
The 18 is obviously the measurement across the face of the rim
You normally never go wider when using a snow tire . The narrower the tire the less "float" you'll get in snow, but if the price is right and it will fit.....

245/45/18...The 245 is the width of the tire , but it may not be exactly 245MM every manufacturer is different.

The 45 is your tire side wall height in mm
The 18 is obviously the measurement across the face of the rim
You normally never go wider when using a snow tire . The narrower the tire the less "float" you'll get in snow, but if the price is right and it will fit.....

My mistake! I looked on the bridgestonetires site and they didn't note that they're run-flat. Sorry about that.

Did you find out any more about those wheels? Other than that they fit, I mean...

Ya I did some quick research, they seem to be style 168 (m6?) from I found?

They look great on the car too BTW!

Fact that they're sticking out slightly scared me at first, but my Mechanic took it for a spin with stress tests and all, and he told me they're perfect! No rubbing whatsoever or anything to be concerned about.